Oracle CEO Larry Ellison was the only other tech name in the top five, worth $43 billion.

Several notable tech leaders appeared on the Forbes' billionaires list. Amazon.com CEO Jeff Bezos finished at 19th on the list with $25.2 billion, followed by Google co-founders Larry Page ($23 billion) and Sergey Brin ($22.8 billion) at 20th and 21st, respectively.

Among the other familiar tech names in the top 100:

49. Dell CEO Michael Dell ($15.3 billion)

51. Microsoft CEO Steve Ballmer ($15.2 billion)

53. Microsoft co-founder Paul Allen ($15 billion)

66. Facebook CEO Mark Zuckerberg ($13.3 billion)

69. Samsung chairman Lee Kun-Hee ($13 billion)

Zuckerberg and Facebook co-founder Dustin Moskovitz are the world's youngest billionares at 28 years old. Facebook representation was high on the young billionaires list, with co-founder Eduardo Saverin and former president and Napster co-founder Sean Parker also appearing.

Also making a cameo: Twitter co-founder Jack Dorsey, who now runs the mobile payment service Square.